I added some custom php to my site in order to be able to embed a leaflet map using an [iframe src=""] tag. This works.
More recently I've wanted to embed a CartoDB map. e.g.
[iframe src="https://bcu.cartodb.com/viz/4aa385ec-f83d-11e5-9dc1-0e3ff518bd15/embed_map" width="827" height="582"]
I initially tried the above method but get a iframe box with no content, as per the image below.
After some searching I found that just pasting the
public_map URL should just work as per here and here. No luck. Nothing happens in the visual editor, and the URL isn't being treated as a hyperlink either.